P. Akkarapatkamchai and W. Naowan, “Model for Building Sustainable Economic Strength and Competitiveness of Tourism and Service Businesses in The New Normal Era in Secondary Cities, Ang Thong Province ”, วารสารวิชาการ มนส. เทพสตรี, vol. 17, no. 2, pp. 1–16, Aug. 2026.